中国物理B ›› 2012, Vol. 21 ›› Issue (9): 90204-090204.doi: 10.1088/1674-1056/21/9/090204
王聚丰a b, 孙凤欣a c, 程玉民a
Wang Ju-Feng (王聚丰)a b, Sun Feng-Xin (孙凤欣)a c, Cheng Yu-Min (程玉民)a
摘要: In this paper, an improved interpolating moving least-square (IIMLS) method is presented. The shape function of the IIMLS method satisfies the property of Kronecker δ function. The weight function used in the IIMLS method is nonsingular. Then the IIMLS method can overcome the difficulties caused by the singularity of the weight function in the IMLS method. And the number of unknown coefficients in the trial function of the IIMLS method is less than that of the moving least-square (MLS) approximation. Then by combining the IIMLS method with the Galerkin weak form of the potential problem, the improved interpolating element-free Galerkin (IIEFG) method for two-dimensional potential problems is presented. Compared with the conventional element-free Galerkin (EFG) method, the IIEFG method can directly use the essential boundary conditions. Then the IIEFG method has a higher accuracy. For demonstration, three numerical examples are solved using the IIEFG method.
中图分类号: (Numerical simulation; solution of equations)